Power Cable Installation Notes/Installation Tutorial

**Tianjin Cable Plant Technology Section Provides the Following Guidelines:** 1. When installing cables parallel to a heat pipe, maintain a minimum distance of 2 meters. If crossing, the distance should be at least 0.5 meters. 2. When cables are installed in parallel or crosswise with other pipes, they must be kept at a minimum distance of 0.5 meters from each other. 3. For directly buried cables rated between 1-35kV, the burial depth should not be less than 0.7 meters to ensure proper protection and insulation. 4. The minimum spacing between cables depends on their voltage level: - For 10kV and below, the spacing should be no less than 0.1 meters. - For 10–35kV, the spacing should be no less than 0.25 meters. - For higher voltages, the distance should be at least 0.5 meters. 5. The minimum bending radius for cables is as follows: - Multi-core cables should have a radius of at least 15 times the outer diameter (15D). - Single-core cables should have a radius of at least 20 times the outer diameter (20D). 6. For cable joints of 6kV and above, the following precautions apply: a. When installing cable terminals, the semi-conductive shielding layer must be carefully removed without damaging the insulation. Avoid knife marks or uneven surfaces. If necessary, use sandpaper to smooth the surface and remove any graphite particles. b. The copper shield and steel armor at the end of plastic-insulated cables must be properly grounded. This helps prevent induced currents and potential hazards like fire or short circuits during unbalanced three-phase operation. Grounding wires should be tinned and galvanized using copper wire, and should never be sealed with a torch to avoid damaging the insulation. c. Each of the three-phase copper shields should be connected separately to the grounding wire. Ensure that the shield grounding wire and the steel armor grounding wire are insulated from each other. The grounding point should be placed as low as possible for optimal performance. 7. The ends of the cables must be waterproofed to prevent moisture ingress and exposure to corrosive substances. This helps avoid insulation aging and the formation of water trees, which can lead to breakdowns. 8. When loading and unloading cables, cranes or forklifts must be used. It is strictly prohibited to lay cables flat or drag them manually. For large cables, special care must be taken to prevent damage from external forces or abrasion to the jacket and insulation. Never bend the conductor by hand, as this can damage the insulation and cause a short circuit. 9. If cables cannot be installed immediately, they should be stored in a dry location, away from direct sunlight and moisture. The ends of the cables must also be protected to prevent water ingress. 10. All installation work should be carried out by qualified technicians who are familiar with cable specifications and safety standards. If you have any doubts or unclear instructions, please consult your technical department or our company’s engineering team promptly. These guidelines are essential for ensuring safe, reliable, and long-lasting cable installations. Always follow them carefully to avoid accidents and equipment failure.

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